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Alopecia areata (AA) and vitiligo are both common skin diseases of autoimmune origin. Both alopecia areata and vitiligo have shown to be affected by oxidative stress. The present work is aimed at evaluating and comparing the serum proinflammatory cytokine levels in AA and nonsegmental vitiligo (NSV). A cross-sectional study was conducted of 33 patients with AA, 30 patients with NSV, and 30 healthy controls. Serum levels of interferon  γ  (IFN- γ ), interleukin- (IL-) 1 β , and IL-6 were determined quantitatively by ELISA method. Our analysis identified a  signature  of  oxidative stress  associated with AA and NSV, characterized by elevated levels of IFN- γ  (AA:  p  = 0.007283; NSV:  p  = 0.038467), IL-1 β  (AA; NSV:  p  ≤ 0.001), and IL-6 (AA; NSV:  p  ≤ 0.001). IL-6 was also significantly increased in NSV patients in comparison with AA patients ( p  = 0.004485). Our results supported the hypothesis that oxidative stress may play a significant role in promoting and amplifying the inflammatory process both in AA and vitiligo. The complex understanding of both disease etiopathogenesis involves interrelationships between oxidative stress and autoimmunity. The clinical study registration number is RNN/266/16/KE.

Increased Serum Levels of IFN-γ, IL-1β, and IL-6 in Patients with Alopecia Areata and Nonsegmental Vitiligo